MediaStream should fire ended event when all tracks are ended

Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp

Index: Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp
diff --git a/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp b/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp
index 060adfa418e16b994dc45a0c96f4b8d7fb5e0d35..2e14157926044d2809ec3b4882857c1d206d468a 100644
--- a/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp
+++ b/Source/WebCore/Modules/mediastream/MediaStreamTrack.cpp
@@ -29,22 +29,24 @@
 #if ENABLE(MEDIA_STREAM)
 
 #include "Event.h"
+#include "MediaStream.h"
 #include "MediaStreamCenter.h"
 #include "MediaStreamComponent.h"
 
 namespace WebCore {
 
-PassRefPtr<MediaStreamTrack> MediaStreamTrack::create(ScriptExecutionContext* context, MediaStreamComponent* component)
+PassRefPtr<MediaStreamTrack> MediaStreamTrack::create(ScriptExecutionContext* context, MediaStreamComponent* component, MediaStream* stream)
 {
-    RefPtr<MediaStreamTrack> track = adoptRef(new MediaStreamTrack(context, component));
+    RefPtr<MediaStreamTrack> track = adoptRef(new MediaStreamTrack(context, component, stream));
     track->suspendIfNeeded();
     return track.release();
 }
 
-MediaStreamTrack::MediaStreamTrack(ScriptExecutionContext* context, MediaStreamComponent* component)
+MediaStreamTrack::MediaStreamTrack(ScriptExecutionContext* context, MediaStreamComponent* component, MediaStream* stream)
     : ActiveDOMObject(context)
     , m_stopped(false)
     , m_component(component)
+    , m_stream(stream)
 {
     m_component->source()->addObserver(this);
 }
@@ -135,6 +137,8 @@ void MediaStreamTrack::sourceChangedState()
         break;
     case MediaStreamSource::ReadyStateEnded:
         dispatchEvent(Event::create(eventNames().endedEvent, false, false));
+        if (m_stream)
+            m_stream->trackEndedNotification();
         break;
     }
 }
@@ -147,6 +151,8 @@ MediaStreamComponent* MediaStreamTrack::component()
 void MediaStreamTrack::stop()
 {
     m_stopped = true;
+    if (m_stream)
+        m_stream->trackEndedNotification();
 }
 
 const AtomicString& MediaStreamTrack::interfaceName() const